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The anterior thoracic nerve from the C5 to C8 roots innervates the pectoralis major and minor, and the thoracodorsal nerve from C6 to C8 roots innervates the latissimus dorsi muscle. The axillary nerve is formed by fibers of the C5 to C6 roots which go through the posterior cord of the plexus and innervate the deltoid and teres minor muscles, as well as part of the skin of the lateral shoulder.
All the intrinsic muscles of the tongue are innervated by the hypoglossal nerve. These muscles are the transversus, verticalis and longitudinalis linguae muscles. The intrinsic tongue muscles are used to elongate the protruding tongue and to control fine shaping movements needed for manipulating food and for speech.he areas innervated by the hypoglossal nerve consist of almost all the muscles of the tongue. Find out the details of the hypoglossal nerve's function. slide 1 of 5. The hypoglossal nerve is the twelfth and final cranial nerve (XII).